National Highway 21 (NH 21) is a primary national highway in India.

This highway connects Jaipur in Rajasthan to Agra and Bareilly in Uttar Pradesh[1][2] This national highway is 502 km (312 mi) long starting from Patrika Chowk in Jaipur till its end at Lalpur Chauraha in Bareilly.

[3] Jaipur to Agra section of NH 21 was known as NH 11 before renumbering of all national highways by Ministry of Road Transport and Highways in 2010.

[4]